Systems and methods for identifying faulty touch panel having intermittent field failures

ABSTRACT

An electronic device having a faulty touch panel may be diagnosed and indicated for repair by extracting a log from the electronic device. The log may include a record of touch panel events indicating active and inactive touch panel events divided into time periods. The log may be analyzed for touch panel events in a given time period. If a total number of touch panel events in a given time period exceeds a threshold count, and if a percentage of touch panel events in that given time period exceeds a threshold percentage, the touch panel may be identified as in need of replacement. Further, if a total number of touch panel events for all time periods exceeds a threshold percentage, the touch panel may be identified as in need of replacement.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation of U.S. Non-Provisional patentapplication Ser. No. 14/946,150 for SYSTEMS AND METHODS FOR IDENTIFYINGFAULTY TOUCH PANEL HAVING INTERMITTENT FIELD FAILURES filed Nov. 19,2015, which claims priority to and the benefit of U.S. ProvisionalPatent Application No. 62/093,859 for METHOD TO IDENTIFY BAD TOUCH PANELWITH INTERMITTENT FIELD FAILURES filed Dec. 18, 2014. Each of theforegoing applications is hereby incorporated by reference in itsentirety.

FIELD

Embodiments of present invention generally relate to the field ofelectronic device maintenance and, more specifically, to systems andmethods for identifying faulty touch panel screens that haveintermittent field failures.

BACKGROUND

To register user actions on a computer screen, a touch panel overlay maybe placed over the top of the computer screen (e.g., on top of theliquid crystal display (LCD) screen of a personal data terminal (PDT),personal digital assistant (PDA), or desktop personal computer (PC)).The touch panel overlay component, however, wears over time due to themechanical stress imposed from stylus or finger presses.

Before a touch panel screen fails completely, the touch panel may gointo an intermittent failure mode whereby the touch panel occasionallyregisters a false touch. The intermittent failure is typically caused byan internal short in the touch panel component. The short in the faulty(i.e., defective, bad, flawed, etc.) touch panel screen will activateintermittently (i.e., come and go) based upon various conditions such astemperature, pressure, touches at other locations, etc.

When the touch panel enters into an intermittent failure mode, it isdifficult for a maintenance or repair technician to diagnose the faultytouch panel because the panel may not be in the failure mode at the timeof the attempted repair. This situation can lead to missed repairopportunities and the repeated return of failing devices causingfrustration for the device user/customer.

Therefore, a need exists for more effective maintenance systems andmethods for electronic devices, including but not limited to maintenancesystems and methods that facilitate accurate detection of faulty touchpanels in an intermittent failure mode.

SUMMARY

Exemplary systems and methods for identifying faulty touch panels in anelectronic device are disclosed. In an exemplary embodiment, a log isextracted from the electronic device that has a touch panel. The log hasa record of touch panel events indicating active and inactive touchpanel events divided into time periods. The log may be analyzed fortouch panel events in a given time period. If a total number of touchpanel events in a given time period exceeds a threshold count, and if apercentage of touch panel events in that given time period exceeds athreshold percentage, the touch panel is indicated to the technician asin need of replacement. Further, if a total number of touch panel eventsfor all time periods exceeds a threshold percentage, the touch panel isalso indicated to the technician as in need of replacement.

The exemplary embodiment described herein identifies intermittent modefaulty touch panels by capturing specific time monitored events andlogging these events. At the time of a repair, these event logs may beanalyzed for specific characteristics that identify the defective touchpanels. The result is then reported to the repair technician. In thisregard, even if current touch panel tests are acceptable, the technicianis advised that the panel is bad due to the intermittent field failuresreport.

The foregoing illustrative summary, as well as other exemplaryobjectives and/or advantages of the invention, and the manner in whichthe same are accomplished, are further explained within the followingdetailed description and its accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of an exemplary embodiment of the method toidentify bad touch panels having intermittent field failures.

FIG. 2 is a view of an exemplary embodiment of a log file generated bysoftware embodying the exemplary method to identify bad touch panelswith intermittent field failures.

FIG. 3 is a screenshot of an exemplary embodiment of software embodyingthe exemplary method to identify bad touch panels with intermittentfield failures.

FIG. 4 is a screenshot of an exemplary embodiment of a propertiessettings screen of software embodying the exemplary method to identifybad touch panels with intermittent field failures.

FIG. 5 is a screenshot of an exemplary embodiment of software embodyingthe exemplary method to identify bad touch panels with intermittentfield failures where failures have been identified and the touch panelis indicated as in need of replacement.

FIG. 6A is a first part of a flowchart illustrating a log extractionstep of the exemplary method to identify bad touch panels withintermittent field failures.

FIG. 6R is a second part of the flowchart of FIG. 6A.

FIG. 7 is a flowchart illustrating a step of analyzing the log of thetouch panel of the exemplary method to identify bad touch panels withintermittent field failures.

FIG. 8A is a first part of a flow chart illustrating a software upgradestep of the exemplary method to identify faulty touch panels withintermittent field failures.

FIG. 8B is a second part of the flowchart of FIG. 8A.

DETAILED DESCRIPTION

Generally, exemplary systems and methods for identifying defective touchpanels in an electronic device are disclosed. A log may be extractedfrom the electronic device having a touch panel. The log has a record oftouch panel events indicating active and inactive touch panel eventsdivided into time periods. The log may then be analyzed for touch panelevents in a given time period. If a total number of touch panel eventsin a given time period exceeds a threshold count, and if a percentage oftouch panel events in that given time period exceeds a thresholdpercentage, the touch panel is indicated to the technician as in need ofreplacement. Further, if a total number of touch panel events for alltime periods exceeds a threshold percentage, the touch panel is alsoindicated to the technician as in need of replacement. Further, thesoftware on the electronic device may be upgraded.

FIG. 1 depicts a flow chart 100 of a first exemplary embodiment of amethod to identify defective touch panels that have intermittent fieldfailures. The exemplary method as shown includes three steps. First, alog of touch panel events is extracted from the electronic device 101.Second, the touch panel log is analyzed to determine if the touch panelshould be replaced 102. Third, and optionally, the software on theelectronic device is upgraded 103.

Although the exemplary method/system embodiments may be described andutilized in connection with electronic devices such as personal dataterminals (“PDT”), personal digital assistants (“PDA”), and personaldesktop computers (“PCs”) having touch panels, and more specifically aHONEYWELL 99EX PDT, the methods/systems described may be implementedwith any electronic device that includes a touch panel in order todiagnose touch panel defects. Generally, an exemplary electronic device(e.g., a PDT) may include, but is not limited to, operating componentssuch as a central processing unit, a system bus, a main memory (e.g.,RAM, ROM, etc.), a mass storage device (e.g., a hard disk), an operatingsystem (e.g., MICROSOFT WINDOWS) stored on the mass storage device andexecuted by the central processing unit, and a computer touch screen (orother input/display devices) for receiving input from a user anddisplaying information.

FIG. 2 is an illustration of an exemplary log relating to touch panelactivity that the electronic device may be configured to keep. Firmwareresiding on the electronic device (i.e., stored in memory) captures thetouch panel status at all unattended or suspend/wake events. Thefirmware is designed to specifically monitor/log two conditions, namely,inactive/“no press” touch panel events or active/press touch panelevents. All captured events are saved in an event log, titled as“TLOG.txt” in the example, but other names may be utilized for the log.

The log (e.g., the TLOG.txt log of FIG. 2) may be formatted as an ASCIItext file to conserve storage space. The log size may also be limited toa maximum size of 5000 characters, or some other limited number. Oncethe log has reached the maximum allowed size, the oldest portion of thelog may be overwritten with new entries.

The log may be further structured such that each line in the text fileis either a new day, or a new entry since the last reset of theelectronic device. As shown in FIG. 2, each entry may be prefixed with a“D” to indicate a new day or an “R” to indicate a reset. The firmwaremay then record a “1” to indicate an inactive/“no press” touch panelevent or a “0” to indicate each active/press touch panel event. Othercharacters or coding may be used. The advantage of using an ASCII textfile for storage of the log is that it is readable by humans (e.g., adevice technician), but the log may be encoded in other condensedformats where storage space is critical.

FIGS. 3-5 illustrate screenshots of an exemplary software utility forextracting and analyzing logs, as well as updating firmware on anelectronic device. Although the software utility is shown with agraphical user interface (“GUI”), the method may be performed in acommand line or other interface as well. The GUI provides an enhanceduser interface that is easy to read and run for a technician diagnosinga touch panel for defects.

With reference to FIGS. 3-5, the GUI includes a window 200, includingstandard operating system (e.g., WINDOWS) controls 202, that is dividedinto three main panes: a tool bar 204, an activity pane 206, and adiagnostic pane 208. The tool bar 204 includes three buttons: start 210,stop 212, and print 214. The start button 210 starts the extraction andanalysis of the log and upgrades the firmware, if desired, on theelectronic device. The stop button 212 stops and/or aborts theactivities commenced or underway. The print button 214 prints theresults of the diagnostic pane 208 of the software utility. Optionally,the results of the activity pane may also be included.

Although a MICROSOFT WINDOWS operating environment is shown, thesoftware utility may be programmed in any desirable language and run onany operating system as desired. It is contemplated that the softwareutility run on a technician's device, such as a PC, and the electronicdevice under repair be connected to the device through a wiredconnection, such as a serial port interface, USB interface, or otherconnection. Proprietary communications connections may also be used.Although a wired connection is contemplated, the communications may alsobe wireless and even performed remotely, at least to identify a faultytouch panel, saving the customer time, expense, and loss of use of theelectronic device needing repair relating to time in transit for devicesnot needing a touch panel replacement.

The activity pane 206 lists the actions being taken and the status ofthose actions as they are performed by the software utility, which isuseful for the technician to see that the software utility is performingcorrectly.

The diagnostic pane 208 provides a formatted output of the analysis ofthe log and identifies if the touch panel should be replaced by thetechnician. A completed report is best seen in FIG. 5. The results arereported in a chart including rows for “Worst Day” and “Total” andcolumns for “TotalInactive” (indicating inactive/“no press” touch panelevents), “TotalActive” (indicating active/press touch panel events),“TotalCount” (indicating the total number of touch panel events), “%Failures” (indicating the percentage of touch panel failures in the log)and “RepairActions” (providing an indication as to whether the touchpanel should be replaced). In addition to the formatted output of theanalysis, the diagnostic pane 208 also includes the device serial numberof the electronic device and the date and time the report was created.

FIG. 4 provides an illustration of properties window 216, which includessettings for locations and names of the log and directory path for thelog. Further, if an upgrade to the electronic device firmware is needed(e.g., to upgrade device parameters), file names and paths to theupgrade may be provided so that the upgrade of the firmware may beperformed by the software utility. As described further below, entriesin the fields of the properties pane are used to identify whether anupgrade is needed and where to find those upgrade files.

FIGS. 6A and 6B, collectively, provide a flowchart showing an exemplarylog extraction process (step 600) from an electronic device. At step601, the software utility ascertains whether the required propertiesvalues are set in the preferences pane (as best shown at FIG. 4). Ifnot, the software prevents the user from activating the start button bygraying it out at step 602. If, however, the required properties areset, the start button is marked black and remains active in step 603. Instep 604, the software utility waits for user input.

If the user selects “Help/About” (step 605), the software utilitydisplays the software utility name and version and returns to step 604after a short delay at step 619. At step 606, if the user (e.g., atechnician) selects “Close,” the software utility exits the program. Atstep 607, if the user selects “Tools/Settings,” the software utilitydisplays the properties windows at step 608 (which is best seen in FIG.4), and waits for user input at step 609. The user may then: change,delete, or edit the fields of the properties window at step 610 andselect “apply” at step 611 which saves the changed fields of theproperties window at step 612, but leaves the properties window open forfurther review and/or editing; select “OK” at step 613, which saves thechanged fields of the properties window at step 614 and returns to step601; or select “Cancel” at step 615 which closes the properties windowwithout saving the fields and returns to step 601.

If the user presses the start button, illustrated at step 616, thesoftware utility verifies that the required values of the propertieswindow have been set at step 617. If not, the software utility displaysan error message at step 618 and returns to step 604 after a short delayat step 619. If the required values are set, the software utility atstep 620 prepares the electronic device by copying settings filelocally, transferring changes to the system (such as the registry) tothe electronic device, and terminating running processes on theelectronic device.

As shown at FIG. 6B, once the processes have been terminated, theelectronic device is rebooted at step 621. The software utility waitsfor the electronic device to finish rebooting at step 622. At step 623the serial number and manufacturing data are queried from the electronicdevice. At step 624, the software utility may create directories for thelog storage directory and subdirectories according to the settings inthe required properties window on the technician's computer. At step625, the log files are copied from the electronic device.

At steps 626, 627, 628, 629, and 630, the software utility may alsoquery the electronic device for other logs, such as battery usage andfault logs. At step 631, the log extraction is complete.

FIG. 7 provides a flowchart of the software utility analyzing the log todetermine if the touch panel should be replaced because it isexperiencing intermittent failures (step 700). The software utilitycreates and initializes six variables to zero at step 701:“TotalIdleCount” (i.e., total idle count), “TotalActiveCount” (i.e.,total active count), “CurldleCount” (i.e., current idle count),“CurActiveCount” (i.e., current active count), “PrevIdleCount” (i.e.,previous idle count), and “PrevActiveCount” (i.e. previous activecount). The function of these variables, described further below, is todetermine the poorest period of performance of the touch panel, asindicated by the log, and to determine the total number of eventslogged.

To determine the values for the variables, the software utility parsesthe log files and increments the variables, reading each line from thelog file. Specifically, at step 702, the software utility opens the logfile. The software utility then reads a line from the log file at step703. The number of 0's and 1's on the line are counted. “CurIdleCount”is set equal to the number of 1's and “CurActiveCount” is set equal tothe number of 0's counted on the line, respectively, at step 704 (as in,for example, TLOG.txt of FIG. 2). The value of “CurIdleCount” is addedto “TotalIdleCount” and the value of “CurActiveCount” is added to“TotalActiveAcount” at step 705.

At step 706, the software utility determines if at least thirty (30)touch panel events have occurred in the given period. If not, thesoftware utility skips to step 709. If yes, the software utilitydetermines if the percentage of bad events on the current period isworse than any previous period by comparing the percentage of“CurActiveCount” to the percentage of “PrevActiveCount” at step 707. Ifnot, the software utility skips to step 709. If yes, the softwareutility assigns “PrevActiveCount” the same value as “CurActiveCount” andassigns “PrevIdleCount” the same value as “CurIdleCount” at step 708.

At step 709, the software utility determines if it has reached the endof the log. If not, the software utility returns to step 703 and repeatssteps 703-709 until the end of the log file is reached. In this manner,the worst performing period of the electronic device will be determinedand assigned to the values of “PrevActiveCount” and “PrevIdleCount.”Furthermore, “TotalIdleCount” and “TotalActiveAcount” will have a totalfor all events over all logged time periods for the electronic device asindicated at step 710.

At step 711, the software utility indicates that the touch panel shouldbe replaced under two different conditions. If either condition exists,the touch panel is deemed bad and a repair indication is made to thetechnician. Under the first condition, the touch panel should bereplaced if the worst day percentage of failures exceeds a thresholdfailure percent, such as twenty percent. This may be represented by theformula (“PrevActiveCount”÷(“PrevIdleCount”+“PrevActiveCount”))×100>20.

Under the second condition, the touch panel should be replaced if thetotal failures percentage exceeds a threshold failure percent, such astwenty percent. This may be represented by the formula(“TotalActiveCount”/(“TotalIdleCount”+“TotalActiveCount”))×100>20. Aperson having skill in the art will recognize that the threshold failurepercentage may be other than twenty percent, and may be calibrated to apercentage that contemplates other factors according to a cost benefitanalysis. At step 712, the analysis of the log is complete.

FIGS. 8A and 8B, collectively, provide a flowchart illustrating theprocess of updating the firmware/software on an electronic device (shownas step 800). At step 801, the outdated files are deleted from theelectronic device. At step 802, the new files are copied to theelectronic device from a folder previously designated in the requiredproperties window. The copy operation progress and status will bedisplayed in the activity pane 206.

At step 803, if the electronic device further includes removable storagesuch as an SD Card, those files will be deleted as well. At step 804, ifthe electronic device includes a custom firmware package designated inthe optional properties window, the software utility will copy thecustom firmware from the folder designated at step 805 and unpack it atstep 806.

At step 807, if the electronic device includes a battery profiledesignated in the optional properties window, the software utility willcopy the battery profile from the folder designated to the electronicdevice at step 808. The copy operation progress and status will bedisplayed in the activity pane 206.

At step 809, if an optional service pack update is designated in theoptional properties window, the software utility will copy the servicepack update from the folder designated at step 810. The copy operationprogress and status will be displayed in the activity pane 206.

At step 811, if a registry file is designated in the optional propertieswindow, the software utility will copy the registry file from the folderdesignated at step 812. The copy operation progress and status will bedisplayed in the activity pane.

At step 813, if an Autorun file is designated in the optional propertieswindow, the software utility will copy the Autorun file from the folderdesignated at step 814. The copy operation progress and status will bedisplayed in the activity pane 206.

At step 815, if an upgrade (“UGP”) file is designated in the optionalproperties window, the software utility will copy the UGP file from thefolder designated at step 816. The copy operation progress and statuswill be displayed in the activity pane. At step 817, the UGP file willbe run. At step 818, the upgrade status will be displayed in theactivity pane 206 as complete. At step 819, the upgrade is complete.

In summary, it can be appreciated from the foregoing description andillustrations that the exemplary systems and methods for identifying badtouch panels in an electronic device facilitates electronic devicerepairs. By analyzing intermittent failures and determining whether thefrequency of failures exceeds certain threshold criteria, a techniciancan accurately conclude whether to replace the touch panel, therebyminimizing missed repairs and repeat return of failing devices.

To supplement the present disclosure, this application incorporatesentirely by reference the following commonly assigned patents, patentapplication publications, and patent applications:

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In the specification and/or figures, typical embodiments andenvironments of the invention have been disclosed. The present inventionis not limited to such exemplary embodiments. The use of the term“and/or” includes any and all combinations of one or more of theassociated listed items. The figures are schematic representations andso are not necessarily drawn to scale. Unless otherwise noted, specificterms have been used in a generic and descriptive sense and not forpurposes of limitation.

The invention claimed is:
 1. A computing device for identifying a faultytouch panel, the computing device comprising: a memory that storescomputer-executable instructions; and a processor that executes thecomputer-executable instructions to perform operations comprising:extracting a log from a computing device that has a touch panel, the logcomprising a record of unattended touch panel events indicating activetouch panel events and inactive touch panel events in a plurality oftime periods, wherein the active touch panel events comprise touch panelfailures; analyzing the log comprising the record of the unattendedtouch panel events to determine at least one of: an unattended touchpanel events count in a time period of the plurality of time periodsexceeds a threshold count and a percentage of an active touch panelevents count to the unattended touch panel events count in the timeperiod exceeds a first threshold percentage; and a percentage of a totalactive touch panel events count to a total unattended touch panel eventscount in the plurality of time periods exceeds a second thresholdpercentage; and in response to the determination, generating anotification to a technician that the touch panel should be replaced. 2.The computing device of claim 1, wherein the threshold count is
 30. 3.The computing device of claim 1, wherein at least one of the firstthreshold percentage and the second threshold percentage is 20%.
 4. Thecomputing device of claim 1, wherein the time period is one day.
 5. Thecomputing device of claim 4, wherein a day is designated with a “D”prefix in the log.
 6. The computing device of claim 1, wherein the timeperiod is a time period since a reset of the computing device.
 7. Thecomputing device of claim 6, wherein the reset is designated with an “R”prefix in the log.
 8. The computing device of claim 1, where each timeperiod is indicated with a new line in the log.
 9. The computing deviceof claim 1, wherein each active touch panel event is designated as a Oin the log.
 10. The computing device of claim 1, wherein each inactivetouch panel event is designated as a 1 in the log.
 11. The computingdevice of claim 1, further comprising upgrading software of thecomputing device.
 12. A computer program product for maintaining touchpanels, wherein the computer program product comprises: a computerreadable storage medium having computer readable program code embodiedin said computer readable storage medium, said computer readable programcode comprising the steps of: extracting a log from a computing devicethat has a touch panel, the log comprising a record of unattended touchpanel events indicating active touch panel events and inactive touchpanel events in a plurality of time periods, wherein the active touchpanel events comprise touch panel failures; analyzing the log comprisingthe record of the unattended touch panel events to determine at leastone of: an unattended touch panel events count in a time period of theplurality of time periods exceeds a threshold count and a percentage ofan active touch panel events count to the unattended touch panel eventscount for the time period exceeds a first threshold percentage; and apercentage of a total active touch panel events count to a totalunattended touch panel events count in the plurality of time periodsexceeds a second threshold percentage; and in response to thedetermination, generating a notification to a technician that the touchpanel should be replaced.
 13. The computer program product of claim 12,wherein the threshold count is
 30. 14. The computer program product ofclaim 12, wherein at least one of the first threshold percentage and thesecond threshold percentage is 20%.
 15. The computer program product ofclaim 12, wherein the time period is one day.
 16. The computer programproduct of claim 12, wherein the time period is a time period since areset of the computing device.
 17. An apparatus for identifying a faultytouch panel, the apparatus comprising: a processor configured to:extract a log from a computing device that has a touch panel, the logcomprising a record of unattended touch panel events indicating activetouch panel events and inactive touch panel events in a plurality oftime periods, wherein the active touch panel events comprise touch panelfailures; analyzing the log comprising the record of the unattendedtouch panel events to determine at least one of: an unattended touchpanel events count in a time period of the plurality of time periodsexceeds a threshold count and a percentage of an active touch panelevents count to the unattended touch panel events count for the timeperiod exceeds a first threshold percentage; and a percentage of a totalactive touch panel events count to a total unattended touch panel eventscount in the plurality of time periods exceeds a second thresholdpercentage; and in response to the determination, generating anotification to a technician that the touch panel should be replaced.18. The apparatus of claim 17, wherein the threshold count is
 30. 19.The apparatus of claim 17, wherein at least one of the first thresholdpercentage and the second threshold percentage is 20%.
 20. The apparatusof claim 17, wherein the time period is one of a day and a time periodsince a reset of the computing device.